How severe is CVE-2022-40622?

CVE-2022-40622 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-40622 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-40622?

CVE-2022-40622 affects Wavlink Wn531g3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-40622?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-40622 published?

CVE-2022-40622 was published on 2022-09-13 and last updated on 2026-06-17.

CVE-2022-40622

CVE-2022-40622 is a high-severity vulnerability in Wavlink Wn531g3 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Wavlink Wn531g3 Firmware
Published: 2022-09-13
Last modified: 2026-06-17

Description

The WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 uses IP addresses to hold sessions and does not not use session tokens. Therefore, if an attacker changes their IP address to match the logged-in administrator's, or is behind the same NAT as the logged in administrator, session takeover is possible.

Frequently asked questions

What is CVE-2022-40622?: The WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 uses IP addresses to hold sessions and does not not use session tokens. Therefore, if an attacker changes their IP address to match the logged-in administrator's, or is behind the same NAT as the logged in administrator, session takeover is possible.
How severe is CVE-2022-40622?: CVE-2022-40622 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-40622 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-40622?: CVE-2022-40622 affects Wavlink Wn531g3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-40622?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-40622 published?: CVE-2022-40622 was published on 2022-09-13 and last updated on 2026-06-17.

References

https://youtu.be/cSileV8YbsQ?t=655

Affected products (1)

cpe:2.3:o:wavlink:wn531g3_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Wavlink Wn531g3 Firmware

CVE-2022-40623 — High (CVSS 8.8): The WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 does not utilize anti-CSRF tokens, which,…
CVE-2022-40621 — High (CVSS 7.5): Because the WAVLINK Quantum D4G (WN531G3) running firmware version M31G3.V5030.200325 and earlier communicates over…
CVE-2020-10973 — High (CVSS 7.5): An issue was discovered in Wavlink WN530HG4, Wavlink WN531G3, Wavlink WN533A8, and Wavlink WN551K1 affecting…
CVE-2020-10972 — High (CVSS 7.5): An issue was discovered where a page is exposed that has the current administrator password in cleartext in the source…
CVE-2020-12266 — High (CVSS 7.5): An issue was discovered where there are multiple externally accessible pages that do not require any sort of…

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Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-10611 — Critical (CVSS 10.0): An authentication bypass vulnerability exists in MISP when LDAP mixed authentication is enabled with OTP enforcement.…
CVE-2026-47280 — Critical (CVSS 10.0): Improper authentication in Azure Resource Manager (ARM) allows an unauthorized attacker to elevate privileges over a…
CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
CVE-2026-20182 — Critical (CVSS 10.0): May 2026: This security advisory provides the details and fix information for a vulnerability that was discovered and…

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